Fsc part 2 online preparation for chemistry chapter 3 (group IIIA and Group IVA Elements)

Online Short Questions For Chapter 3 "12th Class Chemistry Chapter 3 Short Questions Preparation "

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Chemistry - 12th Class Chemistry Chapter 3 Short Questions Preparation

Question # 1

Write any two properties of boron which show peculiar behavior?

  • Ans 1: 1.Boron is only element in Group IIIA which is non metallic in behaviour.
    2.It is the only element with less that four electrons in the outermost shell which is not a metal.
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Prepare Complete Set Wise Questions For Chapter 3 "12th Class Chemistry Chapter 3 Short Questions Preparation "

12th Class Chemistry Chapter 3 Short Questions Preparation - Set 1

Question # 1

Write any two properties of boron which show peculiar behavior?

  • Ans 1: 1.Boron is only element in Group IIIA which is non metallic in behaviour.
    2.It is the only element with less that four electrons in the outermost shell which is not a metal.
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12th Class Chemistry Chapter 3 Short Questions Preparation - Set 2

Question # 1

Aqueous solution of borax is alkaline in nature.Justify the statement.

  • Ans 1: Aqueous solution is alkaline in nature due to hydrolysis.
    Na2B4O7+ 7H2O------->2NaOH +4H3BO3
    Borax Strong alkali Weak acid
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12th Class Chemistry Chapter 3 Short Questions Preparation - Set 3

Question # 1

Write two uses of silicons.

  • Ans 1: i) They are used in hydraulic brakes and other hydraulic system.
  • Ans 2: ii) Methyl silicones of high molecular mass resembles rubber and are used in making rubber like tubbing and sheets.
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12th Class Chemistry Chapter 3 Short Questions Preparation - Set 4

Question # 1

Give uses of Lead Suboxide?

  • Ans 1: It is back powder,obtained on heating plumbous oxalate in the absence of air.Other than pigments,it is used in the manufacture of lead storage batteries.
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12th Class Chemistry Chapter 3 Short Questions Preparation - Set 5

Question # 1

Outline any four uses of aluminium?

  • Ans 1: i) It is non-magnetic and is thus used in navigational equipment.
    ii) It is non toxic and can be used for making food and brewing equipments and is packaging.
    iii) Aluminium readily forms alloys with other metals like copper,magnesium,nickel and zinc.
    At home,aluminium is found in the form of cooking utensils,window frames and kitchen foil.
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12th Class Chemistry Chapter 3 Preparation

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